Population oscillations and energy reserves in planktonic cladocera and their consequences to competition

Clyde E. Goulden; Linda L. Hornig

doi:10.1073/pnas.77.3.1716

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Population oscillations and energy reserves in planktonic cladocera and their consequences to competition

Journal article

Open access

Peer reviewed

Population oscillations and energy reserves in planktonic cladocera and their consequences to competition

Clyde E. Goulden and Linda L. Hornig

Proceedings of the National Academy of Sciences - PNAS, v 77(3), pp 1716-1720

01 Mar 1980

DOI: https://doi.org/10.1073/pnas.77.3.1716

PMID: 16592788

Featured in Collection : UN Sustainable Development Goals @ Drexel

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Abstract

Biological Sciences

Daphnia

Population Biology

time lags

triacylglycerol

zooplankton

Time lags in an individual's response to decreased food densities are responsible for oscillations in laboratory populations of Daphnia galeata mendotae . Visible energy reserves of triacylglycerols accumulate in the body of animals at low population densities when food is abundant and are later metabolized at high population densities when food is scarce to temporarily sustain activity and reproduction. After these energy reserves are metabolized many individuals, primarily juveniles, starve and die. The length of the time lags is a function of the amount of energy reserve accumulated in the individual. Because this sustained activity and reproduction further decreases food concentrations to very low levels, individuals of a second smaller-body-sized species, Bosmina longirostris , that do not have sufficient energy reserves quickly starve and die. Thus the accumulation of energy reserves in individuals underlies the time lags important in causing population oscillations and has consequences to interspecific competition.

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Details

Title: Population oscillations and energy reserves in planktonic cladocera and their consequences to competition
Creators: Clyde E. Goulden - Drexel University
Linda L. Hornig - Division of Limnology and Ecology, Academy of Natural Science of Philadelphia, Pennsylvania 19103
Publication Details: Proceedings of the National Academy of Sciences - PNAS, v 77(3), pp 1716-1720
Publisher: PNAS
Resource Type: Journal article
Language: English
Academic Unit: Academy of Natural Sciences of Drexel University
Web of Science ID: WOS:A1980JL81400097
Other Identifier: 991019350590404721